An implementation of laser absorption wavelength-modulation spectroscopy technique combined with quadrature detection of scattered radiation for remote monitoring of atmospheric industrial pollution by means of a compact lidar gas sensor, that may be installed at unmanned aerial vehicles, is presented. The instrument may be used for gas pipeline leak search and monitoring toxic gases near landfills, waste incinerators and other hazardous industries, analyze the internal atmosphere at industrial buildings and technological cycles control, providing sensitivity level of tens ppm*m at typical distances of tens meters. In order to increase the sensitivity of the device, in addition to temperature stabilization the laser radiation frequency is stabilized using a reference spectral absorption line of the selected gas.
Lunar soil studies are planned on-board the Luna-27 polar landing probe of the scheduled Luna-Recourse mission. A sensor, which is called DLS-L, was designed as an additional analytical unit, integrated into a Gas Chromatography GC-L instrument of a Gas Analytical Package, targeted to study products, pyrolytically evolved from soil samples of a close location near the Lunar probe landing point. Gas Analytical Package for direct study of volatiles in the accessible lunar regolith at the landing site is a complex of three instruments: a TA-L thermal analyzer, a GC-L gas chromatograph, and an NGMS neutral gas mass spectrometer. The DLS-L aims in an independent measurement of pyrolytical output dynamics and integral content of Н2О, СО2, and in retrieving of isotopic ratios D/H, 18O/17O/16O, 13C/12C for isotopologues of Н2О and СО2. The DLS-L sensor data would help for further understanding of physics and chemistry of the Lunar body, as original data of polar Lunar soil first-ever direct study.
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